A method for performing a sudden power-off recovery operation of a controller controlling a memory device, the method includes: obtaining open block information for open blocks of the memory device and read counts for the open blocks; updating each of the read counts by adding a set value to each of the read counts; storing the updated read counts in the memory device; sequentially reading pages in each of the open blocks without updating the read counts for the open blocks, based on the open block information, to detect a boundary page after the storing of the updated read counts in the memory device; and controlling the memory device to program dummy data in the detected boundary page.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method of claim 1, wherein the expected read count includes a maximum read count of read operations that are performed in one open block.
3. The method of claim 1, wherein the expected read count includes an average read count of read operations that are performed in one open block.
4. The method of claim 1, wherein the boundary page search scheme includes a linear search scheme.
5. The method of claim 1, wherein the boundary page search scheme includes a binary search scheme.
9. The controller of claim 8, wherein the expected read count includes a maximum read count of read operations that are performed in one open block.
10. The controller of claim 8, wherein the expected read count includes an average read count of read operations that are performed in one open block.
11. The controller of claim 8, wherein the boundary page search scheme includes a linear search scheme.
12. The controller of claim 8, wherein the boundary page search scheme includes a binary search scheme.
14. The controller of claim 13, wherein the processor generates the free block by erasing a memory block in which only invalid data are stored.
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September 1, 2021
June 20, 2023
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